| Leakage behind air mass meter |
| t
| Possible error causes are: |
| 1 - | Connection hoses between air mass meters and turbocharger |
| 2 - | Connection hose to the crankshaft sump breather |
| 3 - | Connecting hose to mechanical turbocharger air recirculation valve |
| Leakage downstream of turbocharger |
| Supercharger pressure too low |
| t
| Possible error causes are: |
| 1 - | Connecting hoses and pipe between turbocharger and charge air cooler |
| 2 - | Hose between charge air coolers and intake manifold |
| 4 - | Seal of charge pressure sender -G31- (in charge-air cooler) |
| 5 - | Seal between throttle valve module and intake manifold |
| 6 - | Gasket between intake manifold and cylinder head |
| Inadequate charge pressure; possible smell of exhaust gas, traces of soot in engine compartment |
| t
| Possible error causes are: |
| 1 - | Connection between turbocharger and exhaust manifold |
| 2 - | Exhaust manifold/cylinder head joint |
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